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<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        * {
            padding: 0px;
        }


        .div {
            width: 400px;
            height: 50px;
            background-color: lightgray;
        }
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<body>
    <div class="ball">球</div>
    <div class="div">相册集</div>
    <p>大家好，我是wj</p>
</body>
<script>
    console.log(123)
</script>

</html>